Improvement in planer-chucks



Patented lune 29,1875.

Hauer Chucks..

A. B. PRUUTY, L. GOES @L G. C. TAFT.

Y A. 3 9 A..

ARK PLACEJLY.

NrrED S'rnJrEs.

PATENT OFFICE.

AUGUSTUS B. IROUTY, 'LORING OOES, ANI)` GEORGE C. TAFT, OF WORCES- TER, MASS.; SAID OOES AND TAF'I ASSIGNORS TO SAID PROUTY.

' IMPROVEMENT IN PLANER-cHucKs."

' Specification forming part of Letters Patent No. 164,934. dated June :29, 1875 application liled December 19, 1873.-

To all whom it may concern:

Be it known that we, AUGUsrUs B. PEOUTY, LoRrNG CoEs, and GEORGE C. TAET, al1 of the city and county of Worcester and Oom monwealth of Massachusetts, have 'invented certain new and useful Improvements in PlanerOhucks; and we do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the accompanying drawings which form a part of this speciication, and inwhieh- Figure 1 represents a plan view of a planerchuck embracing our improvements. Fig. 2 represents a longitudinal section of the same at line A B, Fig. l. Fig. 3 represents a transverse section of the same at line O D, Fig. l.

This invention relates to certain improvements in the construction of the mechanism in a planer-chuck, whereby the adjustment of the chuckjaws for holding the work in the desired position can be readily and conveniently attained, while the various parts can be quickly and firmly secured in position when properly adjusted. It also relates to the devices for holding and adjusting the movable jaw, and to the manner of sustaining the backward strain or thrust of said jaw, as hereinafter' explained.

' In the drawings, the parts `marked A indicate the bottom plate of the chuck, which is to be secured to the bed of the planer by bolts arranged through the openings a, the ange or rib upon the lower part of the plate being tted into one of the grooves upon the bed ot' the planer to prevent the chuck from turning out of position. B indicates a rotating top plate, upon the upper part of which the workbed O and chuck-jaws D and E are arranged. The rotating top plate B is mounted upon the bottom plate A, in the manner shown, and is retained in the proper relative position by a center pintle, A, projecting from the central part of the plate A. The top plate is held down or clamped in any desired position by means of the bolts b b, which pass through the edges of the top plate B, and have their heads held in or attached to levers G G, which latter are fulcrumed under the lian ge or lip c that projects inward from the edge of the bottom plate A, as illustrated, while their long arms extend to, or nearly to, the center of the plate, where they are both acted upon by a lug, H, and cam I, the latter being formed upon the end of a shaft or spindle, J, that extends to the edge of the plate, and is provided with a square or other shaped head, J1, suitable to receive a wrench or other instrument, whereby the said spindle can be turned to bring the cam I into action for depressing or releasing the levers G, and by drawing down the bolts b b to clamp the two plates A B together, or by releasing said bolts to loosen the plates so as to permit of the top plate being rotated. D indicates the movable work-holding jaw, and E the stationary jaw. The jaw D is provided with clamp -bolts K that pass downward through the slots M, and screw into nuts L, arranged within the lower enlarged portion of the slots, as indicated. The jaw D has a horizontal flange, D2, projecting from its side at a short distance above the level of the work-bed O, a sufticientspace being left between the parts for the flan ge N1 of the locking-piece N, which latter is arranged upon the work-bed O in rear ot' the jaw D, in such positionthat the flange N1 will be under the liange D2, in the manner illustrated. The locking-piece N is provided with a series of adjusting-screws, O, which pass through its upper part, with their points resting against the liange D2 ot' the jaw D. The locking-piece N is also provided in this instance with a catch or dog-bar, I), fitted within a longitudinal groove formed in the lower side ofthe locking-piece N, and the bed O of the chuck is provided with a series of parallel grooves, R, formed in its upper surface. The bar I? drops down into one of the grooves -B in the work-bed, and thus prevents the locking-piece from sliding back upon the bed C, while the ange N1, being held down by the flange D2 of the jaw D, which latter is held down by the bolts K, prevents the said locking-piece N from turning over when the set-screws O are turned up against the jaw D to press it toward the jaw E for clamping the work between them. By taking hold ot' the projecting ends ofthe bar P said bar Vcan be raised from the groove R, when the lockingpiece N can be moved back or adjusted to a different position. j

In operating the chuck the work or piece of metal to be operated upon is placed upon the bed U, and the movable jaw D is slid up against it, after it has been adjusted properly against the jaw E. The locking-piece N is next moved up to thejaw D, so that its ange 'N1 will he beneath the flange D2 of the jaw,

and the bar P will drop into the nearest groove lt. The screws 0 are then turnedup so as to press the jaw D rmly against the work, thus clamping it securely in place between the jaws E D. rlhe screws K may be turned down so as to clamp the jaw D firmly to the bed, if desired, or just sufficiently to permit of the jaw being moved thereon without unnecessary looseness. y

To adjust the chuck in a rotary or horizontal position, the operator has simply to apply a wrench to the head J 1 of the shaft J, and by a slight turn to loosen the pressure of the cam l upon the levers G, when the-top plate B can be easily moved as desired.

1f preferred, a pawl or other catch device may be used in lieu of the bar P for entering the groove R, and sustainingthe parts against the backward strain of the chuck-jaw. We

prefer, however, the construction shown.

1t will be observed that the operation of our improved planer-chuck is very convenient and effective, while at the same timethe devices are simple and durable. The grooves R permit of the jaw being quickly arranged at different positions along the bed C, which may be of greater or less length, While said grooves also alford a firm and substantial support for the jaw at any of its adjusted positions.

Having described our improved planerchuck, what we claim therein as new and of our invention, and desire to secure by Letters Patent, is-` 1. The combination, with the movable jaw against the bottom plate, substantially as shown and described. I AUGUSTUS B. PROUTY.. LORING GOES. GEO. C. TAFT. Witnesses:

CHAs. H. BURLEIGH,

GEO. J. MoWRY. 

